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taurus [48]
3 years ago
5

Evaluate -x+4x when x=-2

Mathematics
2 answers:
snow_lady [41]3 years ago
8 0

Use the substitution method

-x+4x  when x=-2

-(-2)+4(-2)  Positive number * ( multiplying)Negative number=Negative number

2-8

=-6

Answer is -6

xenn [34]3 years ago
3 0
The answer is -6. The explanation is shown in the picture.

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Lillian but for hairbrushes at $3.99 each.She had a coupon for $1 off. Her mum paid for half of the remaining cost.Evaluate a nu
Savatey [412]
She will pay $1.50 for the hairbrush and her mum paid $1.50 as well
3 0
3 years ago
15. a music concert is organized at a memorial auditorium. the first row of the auditorium has 16 seats, the second row has 24 s
Drupady [299]

The equation for the nth term in the arithmetic sequence is   8n + 8.

The number of people that can be accommodated in the 16th row is 136.

<h3>What is an  arithmetic progression?</h3>

Arithmetic Progression (AP) is a sequence of numbers in order, in which the difference between any two consecutive numbers is a constant value. It is also called Arithmetic Sequence.

Given that,

No. of seats in first row = 16

No. of seats in second row = 24

No. of seats in third row = 32

Total number of rows = 50

It forms an arithmetic progression

First term = a = 16

common difference d = 8

Number of terms, n = 50

(A) The formula for the n th term of an arithmetic progression is given by

Tn = a + (n - 1) d

    = 16 + (n-1) 8

    = 16 + 8n - 8

Tn = 8n + 8

(B) Now,

n = 16

The number of seats in 16 th row is given by

T(16) = 8 x 16 + 8

T(16) = 136 seats

Hence, (A)The equation for the nth term in the arithmetic sequence is   8n + 8. and (B) The number of people that can be accommodated in the 16th row is 136.

To learn more about arithmetic progression  from the given link:

brainly.com/question/24205483

#SPJ4

4 0
1 year ago
Where on the coordinate plane is the point (-85, 52) located?
marysya [2.9K]

Answer:

go to the left to -85 then go up to 52.

Step-by-step explanation:

x=-85

y=52

7 0
2 years ago
Read 2 more answers
Nolan is deciding between two truck rental companies. Company A charges an initialfee of $90 for the rental plus $2 per mile dri
kotegsom [21]

first we writte the information they are giving to us:

For company A:

initial fee = $90

rent per mile = $2

For combany B:

initial fee = $50

rent per mile = $3

Now for company A the equation that represent the charge in one mile will be: (where n is the number of miles)

\begin{gathered} A=90+2(n) \\ A=90+2(1) \\ A=90 \end{gathered}

And for company B:

\begin{gathered} B=50+3n \\ B=50+3(1) \\ B=53 \end{gathered}

Now to determine the number miles driven, that would make the cost of each company the same, we have to make A = B

\begin{gathered} A=B \\ 90+2n=50+3n \\  \end{gathered}

and finaly we can solve for n

\begin{gathered} 90-50=3n-2n \\ 40=n \end{gathered}

so if they drive for 40 miles the will pay the same

7 0
1 year ago
Which of the following graphs represents the solution to the following system
sdas [7]

Answer:

I am pretty sure it is most likely answer D.

Step-by-step explanation:

Hope this helps! Have a great day and good luck!

5 0
3 years ago
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